| 摘要 |
PURPOSE:To prevent an image carrying belt from being shaken or flapped, and to improve the durability by always making said belt have a moderate tension by an elastic member, even if it expands or contracts. CONSTITUTION:When a display start command is inputted, a motor 6 rotates and a revolving shaft 8a rotates, therefore, a roller 8 rotates. At the same time, a rotation driving force is transmitted by chains 5a, 5b, and a belt 3 is turned and stopped through a stay 35 and an elastic quality part 38. In this case, the belt 3 is pushed and opened toward the outside from the inside peripheral side by springs 31a, 31b, therefore, a moderate tension is applied. Also, even if some unevenness is generated in turning of the chain 5a and 5b, a roller 9 turns minutely centering around a shaft 27, and matches a turning movement of the belt 3. |
